Forum Discussion

Honored Contributor

13 years ago

Cyclone 4 GX - Transceiver - EPCS-pins cannot be used?

Hi, we have a prototype board where we want to use REFCLK4 (Pin L10, F27-package) as reference-clock for a transciever. Now it turned out that we cannot access the EPCS-pins anymore when we use...

Altera_Forum

Honored Contributor

13 years ago

Try putting the toggle rate on those signals to zero

http://www.altera.com/support/kdb/solutions/rd05052003_3407.html

The Tcl constraint is

set_instance_assignment -name IO_MAXIMUM_TOGGLE_RATE "0 MHz" -to $port

where $port is the name of an EPCS pin.

Cheers,

Dave

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Cyclone 4 GX - Transceiver - EPCS-pins cannot be used?

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